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Temperature stabilizing type ultralow dielectric constant microwave dielectric ceramic Li3NaTiO4 and preparation method thereof
The invention discloses a low-loss temperature stabilizing type ultralow dielectric constant microwave dielectric ceramic Li3NaTiO4 and a preparation method thereof. The preparation method comprises the following steps: (1) weighting and dosing the chemical raw materials: Li2CO3, Na2CO3 and TiO2, according to the stoichiometric formula Li3NaTiO4; (2) performing wet ball-milling mixing on the raw materials for 12 hours, taking the distilled water as a ball-milling medium, drying and then pre-sintering for 6 hours under the atmosphere at 850 DEG C; (3) adding a binder into the prepared powder and pelleting, and then pressing and forming, and lastly, sintering for 4 hours under the atmosphere at 900-950 DEG C, wherein the poval solution with the mass concentration at 5% is adopted as the binder and the adding amount of the poval is 3% of the total mass of the powder. The ceramic prepared according to the preparation method provided by the invention is excellent in sintering at the temperature below 960 DEG C, has a dielectric constant within the scope of 18.6-19.7 and a quality factor Qf value as high as 52900-68400GHz, is small in temperature coefficient of resonance frequency and has an ultrahigh application value in industry.
Temperature stabilizing type ultralow dielectric constant microwave dielectric ceramic Li3NaTiO4 and preparation method thereof
The invention discloses a low-loss temperature stabilizing type ultralow dielectric constant microwave dielectric ceramic Li3NaTiO4 and a preparation method thereof. The preparation method comprises the following steps: (1) weighting and dosing the chemical raw materials: Li2CO3, Na2CO3 and TiO2, according to the stoichiometric formula Li3NaTiO4; (2) performing wet ball-milling mixing on the raw materials for 12 hours, taking the distilled water as a ball-milling medium, drying and then pre-sintering for 6 hours under the atmosphere at 850 DEG C; (3) adding a binder into the prepared powder and pelleting, and then pressing and forming, and lastly, sintering for 4 hours under the atmosphere at 900-950 DEG C, wherein the poval solution with the mass concentration at 5% is adopted as the binder and the adding amount of the poval is 3% of the total mass of the powder. The ceramic prepared according to the preparation method provided by the invention is excellent in sintering at the temperature below 960 DEG C, has a dielectric constant within the scope of 18.6-19.7 and a quality factor Qf value as high as 52900-68400GHz, is small in temperature coefficient of resonance frequency and has an ultrahigh application value in industry.
Temperature stabilizing type ultralow dielectric constant microwave dielectric ceramic Li3NaTiO4 and preparation method thereof
SU CONGXUE (author) / TAN XINGLIU (author) / GONG MEILU (author)
2016-01-27
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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